Sum of List with Stream Filter in Java

To get sum of list with stream filter in Java, the code is as follows −

Example

 Live Demo

import java.util.*;
public class Demo
{
   public static void main(String[] args)
   {
      List<Integer> my_list = new ArrayList<Integer>();
      my_list.add(11);
      my_list.add(35);
      my_list.add(56);
      my_list.add(78);
      my_list.add(91);
      System.out.println(sum(my_list));
   }
   public static int sum(List<Integer> my_list)
   {
      System.out.println("In the main function, the sum of list with filter is ");
      return my_list.stream().filter(i -> i > 5).mapToInt(i -> i).sum();
   }
}

Output

In the main function, the sum of list with filter is
271

A class named Demo contains the main function that creates an ArrayList. Elements are added into the arraylist using the ‘add()’ function. The sum of all the elements of the list can be printed on the screen using the ‘sum’ function. Another function named ‘sum’ is defined that returns the filtered output by mapping the value to an integer.